Ian-Mac + Alan T
IMHO to try and knock a few pennies off what is already one of the cheapest parts of the whole model is a false economy, not to say a waste of time (unless you have plenty of it). In the UK, Servo Shop are selling the 6 channel 6gm Planet receivers at £67.50 for 5. That equates to £13.50 each - that's just two cans of Halford's spray paint or perhaps a moulded crew figure - while a new Futaba 2.4GHx Rx is almost £67.50 for one! Granted they are a little flimsy but perfectly adequate if you handle them with due respect, and if a new one either falls apart or refuses to work then you have every right as a consumer to either a working replacement or a refund.
Kenny - I wouldn't consider for a moment trying to convert another type to suit. Even if you understand microwave technology, the things are machine-assembled with such tiny surface-mount components that manual reworking without special (aka expensive) equipment would be impossible.
DM